| Issue |
J. Eur. Opt. Society-Rapid Publ.
Volume 18, Number 2, 2022
|
|
|---|---|---|
| Article Number | 8 | |
| Number of page(s) | 5 | |
| DOI | https://doi.org/10.1051/jeos/2022009 | |
| Published online | 19 September 2022 | |
Research Article
Ultrafast broadband optical modulation in indium tin oxide/titanium dioxide 1D photonic crystal
1
Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
2
Center for Nano Science and Technology@PoliMi, Istituto Italiano di Tecnologia (IIT), Via Giovanni Pascoli, 70/3, 20133 Milan, Italy
3
Istituto di Fotonica e Nanotecnologie IFN – CNR, Via alla Cascata, 56/C, 3812 Povo – Trento, Italy
* Corresponding author: francesco.scotognella@polimi.it
Received:
24
May
2022
Accepted:
27
August
2022
Photonic crystals can integrate plasmonic materials such as Indium Tin Oxide (ITO) in their structure. Exploiting ITO plasmonic properties, it is possible to tune the photonic band gap of the photonic crystal upon the application of an external stimuli. In this work, we have fabricated a one-dimensional multilayer photonic crystal alternating ITO and Titanium Dioxide (TiO2) via radio frequency sputtering and we have triggered its optical response with ultrafast pump-probe spectroscopy. Upon photoexcitation, we observe a change in the refractive index of ITO. Such an effect has been used to create a photonic crystal that changes its photonic bandgap in an ultrafast time scale. All optical modulation in the visible region, that can be tuned by designing the photonic crystal, has been demonstrated.
Key words: Indium tin oxide / Ultrafast spectroscopy / Photonic crystal
© The Author(s), published by EDP Sciences, 2022
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.